import pymysql

class Db:
    def __init__(self):
        self.conn = pymysql.connect(host='localhost',port=3306,user='root',password='1201',db='shop',charset='utf8',cursorclass=pymysql.cursors.DictCursor)
        self.cursor = self.conn.cursor()

    def insert(self,sql):
        self.cursor.execute(sql)
        self.conn.commit()

    def findall(self,sql):
        self.cursor.execute(sql)
        res = self.cursor.fetchall()
        return res
    def findone(self,sql):
        self.cursor.execute(sql)
        res = self.cursor.fetchone()
        return res

db = Db()